The 2020 Toyota 4Runner delivers legendary off-road capability with the proven 4.0L V6 engine. When your 4Runner displays a P0305 code indicating a cylinder 5 misfire, understanding this reliable powertrain helps guide accurate diagnosis.
Understanding P0305 in the 4Runner
The 4Runner's 4.0L 1GR-FE V6 positions cylinder 5 on the rear of the left bank. This engine has an excellent reliability record across decades of production. The engine uses individual coil-on-plug ignition.
V6 Engine Considerations
The 4.0L V6 is known for durability. At this age, ignition component wear is normal. Spark plugs may be approaching service interval. Off-road use can accelerate wear on various components.
Diagnostic Approach
Access the cylinder 5 ignition coil on the left bank. Inspect spark plug condition. Check for vacuum leaks. Verify fuel injector operation.